1 files changed, 85 insertions, 0 deletions
diff --git a/src/org/apache/fop/fo/CharClass.java b/src/org/apache/fop/fo/CharClass.java
new file mode 100644
index 000000000..6723edb57
--- /dev/null
+++ b/src/org/apache/fop/fo/CharClass.java
@@ -0,0 +1,85 @@
+/*
+ * $Id$
+ * Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
+ * For details on use and redistribution please refer to the
+ * LICENSE file included with these sources."
+ */
+
+package org.apache.fop.fo;
+
+
+/**
+ * A character class allowing to distinguish whitespace, LF, other text.
+ */
+public class CharClass {
+
+    /** Character code used to signal a character boundary in
+     * inline content, such as an inline with borders and padding
+     * or a nested block object.
+     */
+    public static final char CODE_EOT=0;
+
+    public static final int UCWHITESPACE=0; // unicode white space
+    public static final int LINEFEED=1;
+    public static final int EOT=2; // Boundary beteween text runs
+    public static final int NONWHITESPACE=3;
+    public static final int XMLWHITESPACE=4;
+
+
+    /**
+     * Return the appropriate CharClass constant for the type
+     * of the passed character.
+     */
+    public static int classOf(char c) {
+	if (c == CODE_EOT) return EOT;
+	if (c == '\n') return LINEFEED;
+	if ( c==' '|| c == '\r' || c=='\t' ) return XMLWHITESPACE;
+	if (isAnySpace(c)) return UCWHITESPACE;
+	return NONWHITESPACE;
+    }
+
+
+    /**
+     * Helper method to determine if the character is a
+     * space with normal behaviour. Normal behaviour means that
+     * it's not non-breaking
+     */
+    private static boolean isSpace(char c) {
+        return (c == ' ' ||
+		(c >= '\u2000' && c <= '\u200B'));
+//         c == '\u2000'                   // en quad
+//         c == '\u2001'                   // em quad
+//         c == '\u2002'                   // en space
+//         c == '\u2003'                   // em space
+//         c == '\u2004'                   // three-per-em space
+//         c == '\u2005'                   // four--per-em space
+//         c == '\u2006'                   // six-per-em space
+//         c == '\u2007'                   // figure space
+//         c == '\u2008'                   // punctuation space
+//         c == '\u2009'                   // thin space
+//         c == '\u200A'                   // hair space
+//         c == '\u200B'                   // zero width space
+
+    }
+
+
+    /**
+     * Method to determine if the character is a nonbreaking
+     * space.
+     */
+    private static boolean isNBSP(char c) {
+        return (c == '\u00A0' ||   // normal no-break space
+		c == '\u202F' ||   // narrow no-break space
+		c == '\u3000' ||   // ideographic space
+		c == '\uFEFF') ;   // zero width no-break space
+    }
+
+    /**
+     * @return true if the character represents any kind of space
+     */
+    private static boolean isAnySpace(char c) {
+        return (isSpace(c) || isNBSP(c));
+    }
+
+}
+